Calculation of Rock Mass Deformation around Deep-Seated Underground Excavations, Considering Weight of the Overlying Strata
M. V. KURLENYA, V. E. MIRENKOV, A. V. SAVCHENKO
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: выработка, пласт, порода, смещения, напряжения, вес пород, уравнения, некорректные задачи, underground excavation, stratum, rock, displacements, stresses, rock weight, equations, ill-defined problems
Abstract
The analytical estimates of stress state of surrounding rock mass around underground excavations neglect the overlying strata weight, which results in the disagreement between the calculated and in situ measured displacements. The authors propose the phenomenological theory of deformation in order to eliminate the mentioned inconsistency. The theory is based on the fact that the direction of the roof rock weight load coincides with the orientation of tensile stresses found in an auxiliary problem. The authors introduce a parameter characterizing ratio of roof rock displacements to floor rock displacements, which allows solving inverse problems using the basic supplement-in situ measured displacements in the floor and roof rocks.
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